Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Positive Symptoms Schizophrenia: Hallucinations and Delusions01:26

Positive Symptoms Schizophrenia: Hallucinations and Delusions

110
Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
Hallucinations
Hallucinations in...
110
Synesthesia01:27

Synesthesia

167
Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
167
Vision01:24

Vision

53.7K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
53.7K
Hallucinogens and Psychedelics01:27

Hallucinogens and Psychedelics

220
Hallucinogens are psychoactive substances that profoundly alter perceptual experiences, generating unreal visual and sensory images. Often referred to as psychedelic drugs — a term derived from the Greek words "psyche" (mind) and "delos" (revealing) — these substances include marijuana and lysergic acid diethylamide (LSD), among others. These drugs vary in intensity and effects.
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains...
220
Visual System01:26

Visual System

630
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
630
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

185
Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes...
185

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Compositional recombination is facilitated by a distributed cortico-cerebellar network.

Cell reports·2026
Same author

Changes in Saccadic Hypometria over Time to Monitor Parkinson's Disease Progression.

Pharmaceutical medicine·2026
Same author

Loneliness predicts worse Parkinsonism: a longitudinal, community-based, clinical-pathological study.

NPJ Parkinson's disease·2026
Same author

Prebiotic intervention changes host and microbe proteomes in plasma extracellular vesicles of Parkinson's disease.

Scientific reports·2026
Same author

Feasibility of Internet-Based Mind-Body Training for Adults With Subjective Cognitive Decline: Protocol for a Randomized Controlled Trial.

JMIR research protocols·2026
Same author

Training a Lens on the Locus Coeruleus-Noradrenergic System in Late-Life Depression.

Biological psychiatry. Cognitive neuroscience and neuroimaging·2026
Same journal

Efficacy of Non-Invasive Brain Stimulation in Alzheimer's Disease: An Umbrella Review of Meta-Analyses.

Neuroscience and biobehavioral reviews·2026
Same journal

Rhythms of interaction - the timescales of social coordination and why they matter.

Neuroscience and biobehavioral reviews·2026
Same journal

Neural Bases of Memory Development: Insights from Magnetic Resonance Imaging.

Neuroscience and biobehavioral reviews·2026
Same journal

Regional Heterogeneity of Brain Insulin Resistance: From Molecular Pathways to Neural Circuits.

Neuroscience and biobehavioral reviews·2026
Same journal

Peripheral nervous system involvement in Parkinson's disease: Peripheral neuropathy, neuromuscular junction dysfunction, and clinical implications.

Neuroscience and biobehavioral reviews·2026
Same journal

Violence on the self: Exploring the intersection of trauma and identity among sexual and gender minorities from a neurobiological and developmental perspective to advance our understanding of PTSD, moral injury, and dissociation symptoms.

Neuroscience and biobehavioral reviews·2026
See all related articles

Related Experiment Video

Updated: Jul 31, 2025

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

22.9K

Understanding visual hallucinations: A new synthesis.

Daniel Collerton1, James Barnes2, Nico J Diederich3

  • 1School of Psychology, Faculty of Medical Sciences, Campus for Ageing and Vitality, Newcastle University, Third Floor, Biomedical Research Building, Newcastle upon Tyne NE4 5PL UK.

Neuroscience and Biobehavioral Reviews
|May 4, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed an integrated Visual Hallucination Framework to understand complex visual hallucinations. This framework harmonizes existing models and guides future research into the causes and treatments of these perceptual experiences.

Keywords:
Anomalous experiencesCharles Bonnet syndromeEye diseaseLewy bodyMisperceptionPsychosisVisionVisual hallucinationVisual perception

More Related Videos

Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

9.0K
Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
05:43

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

5.5K

Related Experiment Videos

Last Updated: Jul 31, 2025

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

22.9K
Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

9.0K
Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback
05:43

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

5.5K

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychiatry

Background:

  • Visual hallucinations are complex phenomena lacking a definitive explanation despite extensive research.
  • Eight distinct models of visual hallucinations exist, each based on different theories of brain organization.
  • Existing models present variability, hindering a unified understanding of visual hallucinations.

Purpose of the Study:

  • To reduce variability in visual hallucination research by creating an integrated framework.
  • To establish a systematic and consistent approach to investigating visual hallucinations.
  • To align research with current theories of both veridical and hallucinatory vision.

Main Methods:

  • Representatives from different research groups collaborated to develop an integrated Visual Hallucination Framework.
  • The framework delineates relevant cognitive systems for hallucination research.
  • It facilitates the study of relationships between hallucination phenomenology and cognitive structures.

Main Results:

  • The integrated framework provides a harmonized interpretation of existing evidence on visual hallucinations.
  • It highlights the episodic nature of hallucinations, suggesting distinct factors for onset, persistence, and cessation.
  • The framework identifies complex relationships between state and trait markers of hallucination risk.

Conclusions:

  • The Visual Hallucination Framework offers a unified approach to studying complex visual hallucinations.
  • It opens new avenues for research into the underlying cognitive and neural mechanisms.
  • The framework may lead to novel therapeutic strategies for distressing hallucinations.